Finishing machine



Nov. 3 1925 F. A.. E. MARSH FIN'IsaING- MACHINE Fn'ed Jan. 5, 1925 www f Patented Nov. 3, 1925.

l l A 1,559,637 YUNITED STATES PATENTQFFICE' FRANK A. n. Mausi-1. or LYNN, 'ILassAcnUs-nrrs, AssrGNon To vUNITED SHOE MA-. i

CHINERY CORPORATION, orrATnnsoN, NEW JERSEY, A oo arolm'rroNA or` NEW TEE SEY.

FIN ISI-IIN G MACHINE. y

Application mea January s, 1925. serieu No; 57a

To all fui/wm t may concern.'

Be it known that I, FRANK A. E. MARSH, 'a citizen of the United States, residing at Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain Improvements in Finishing Machines,

of which the following description, in con nection with the accompanying drawings, is a specification, like referencev characters on the drawings indicating like parts in the several figures. L

,'This invention relates -to finishing machines and more particularly to burnishing tools for such machines of the type employing sectional work-rubbing members.

One conspicuous use ofjfinishing machines is in burnishing the peripheries of leather heels of boots and shoes, and for this purpose machines have been extensively employed which utilize a burnishing toolY made up of sectional, metallic, work-rubbing members. As commonly constructed these tools have comprised sectional workfrubbing members which have been mounted either rigidly or pivotally upon the free ends of flat springs. These springs have been se,-

cured* at their other ends upon va carrierv sleeve which in turn was mountedupon a power-driven shaft. Such an arrangement allowed the various sections of the iron to have in-and-out and twisting movement to accommodate themselves to the work and to avoid making tool marks. Vhen such machines are used by skilled operators, they are highly successful, but when put into the hands of unskilled and careless operatives, objection has been raisedbecause of the noise-created when excessive pressure is applied to the work and because of the breakage of parts due to the application of such In view of the above, one object of the present invention is to provide an improved finishing tool arranged to minimize thefnoise of and breakage in al tool of this character without detracting from the quality of the work performed.

To this end ka feature of the invention relates to an arrangementffor limiting the in-and-out movement of the springsupported work-rubbing members so that such movement is practically eliminated, thus reducingthe noise of the tools during the use of such .machines and at the same time minimizing breakage of the rubbing elements.

Preferably, a. cushion of relatively soft material 1s interposed between the spring-supported work-rubbing members and the carrier member.y y

- Another feature ofthe invention relates to an arrangement designed to give the Workrubbing ymembers freedom for torsional movement lwhile limiting their in-and-out movement. F or this purpose, as illustrated, the interposed cushion is provided with longitudinalV flutes which arel placed in a predetermined relation to the sections ofthe work-rubbing'membersand preferably are so placed that the flutes lie directly beneath the sections. The bases of the illustrated sections are provided with curved surfaces coacting with said flutes to allow a `twisting vmovement of the tool sections on the-ends of the fiatlspringsin order torender the tool less'rigid and'enableit to conform more nearly tothe irregularitiesv of the particular piece of work to which it is applied.L As vin tools of this general character previously used, an overhanging retaining ringco-operates with the Vouter ends of the bases ofthe ,sectional Work-rubbing members to limitv the outward movement thercof'under the action of'centri'fugal force and, in my vimproved construction, the co-operating outer-surfaces upon the bases of the work-'rubbing members are curved in order that the flexing of their spring supports mayvnot be interfered with by reason of this'conta'ct between the bases and the retaining ring; Y

In finishing machines employing burnishf ing tools of this character the `tool is sometimes heated4 electrically by means of Va' cartridge unit carried within the tool-carrying shaft atfa point adjacent to the burnishing tool. l In view of theyfact, however, that such tools, as 'previously constructed, have been provided witha space between thef'carrier sleeve ofthe tool and the tool-carrying sections, th'e heat of the electric unit could only 1With this object 1n `view the fiuted ring Y used, as above-described, in the burnishing tool for another purpose is made of metal g having a high heat conductivity and contacts y ber 14 formed as a sleeve.

CII

directly with both the tool sections and the carrier sleeve. iis a result the heat of the electric unit is transmitted to the sections of the burnishing tool with considerable eficiency because of this direct conductive path between the sections ofthe t'ooland'the electric unit.

These and other features of the invention will be more readily understood from a consideration of the following specification taken in connection with the accompanying drawings in which:

Fig. 1 is a perspective view of a burnishing tool, embodying my invention, viewed from the rear and havin-g one section removed;

Fig, 2 is 'a perspective view of a single section of the burnis'hing tool together with .tupporting spring 'Fig'. 3v is a transverse section on the' line S?, of Fig. 4; and

4 is a longitudinal section through the center of the burnishing tool and its supporting shaft. Tools of Ythevg'reneral character described, in order fthat they` may conform to the cu'rvature of a vparticular style fheel which is to be burnished, for example, are made interchangeable so that, i'n any particular tool, the individual work-rubbing members may be so curved that the resulting lperiphery of the tool has the desired shape. To this end the individual work-rubbing members '10, having curved, outer, work-contacting surfaces 12, are supported upon a carrier-mem- This carrier sleeve is enlargedV at the end remote from the work-rubbing toolsand the enlarged end Ais grooved at 16 to receive flat springs 18 which are heldin place by 'screw studs 20. This method of mounting the springs on the carrier sleeve prevents twisting laround 'the point of attachmentl with a resultant unde sired change in the relative spacing of the various sections of the work-rubbing member. As best seen in Fig. '2, each of the work-rubbing members 10 is pro-vided with a shank 22 interposed between the work-l rubbing portion anda. base portion24. This base portion is secured tio the end of the spring 18 by means 0f Vrivets 26 passing through an extension or sub-base v28 secured to the under side of the end of the spring. The inner rivet passes through the spring 18 as well. This extension 28 vis provided with 'a rounded under surface and has a reduced end portion which is curved, as shownat 30, for a purpose to be laterexplained.A A correspondingly reduced portionl of the base 24 is curved at 32 in a re.-

vverse direction. At the outer end of the carrier sleeve 14 a yguard ring 34 i's provided having an overhanging portion which cooperates with the reduced extension of the base having the curved upper surface 32 and prevents the work-rubbing members from flying out under the action of centrifugal force.

Between the carrier member 14 and the spring extensions 28 a soft metal ring 40 v'actiii,; i" 'a cushion of relatively soft material is mounted and held in'c'lose contact with'the carrier sleeve by rivets 44 of a similar metal. This ring 40 is provided with longitudinal flutes 43 which, in the preferred form of the invention illustrated herein, are disposed immediately beneath the rounded extensions 28 on the under side of the flat springs. As will be noted from Fig. 3, the curvature of the surface 30 is on a slightly smaller radius thant-he radius of curvature of the flutes 43 of the ring 40 so that arocking or twisting action is allowed to the individual work-rubbing members to enable them to conform to irregularities of the work while at the same time inward movement is restricted or vpractically 'eliminated as they rest. on the cushion ring 40. This twisting 'movement 'is not interfered with by the loverhangingv guard '34 because of the lcurved surfaces -32 vupon the upper side ofthe outer ends of the bases of the work-rubbing members. The clearance between these upper Outer endsof the bases of the work-rubbing members and the inner side of the retaining ring 34 will usually be limited to a few thousandths of aninch.

i/Vhen such a tool is mounted in a finishing machine in which it is desired to heat the tool'electrically, it is secured` on a reduced .portion of a tool-carrying shaft l50, the outer end of which is split and expanded by means of a tapered plug `52 which thereby holds the tool in position. Heat is supplied to the tool mounted in this fashion by means of a cartridge unit 54 carried in the hollow of the shaft and current is supplied to this unit in a manner well understood in the art by means of conductors running through the hollow shaft and connected individually to collector rings 5G which are insulated from the shaft as indicated at 58 and to which current is supplied by means of brushes 60. A vguard member, indicated at 62, is supported upon a fixed portion V64 of the frame of the m chine and covers the springs of the burnishing tool without restricting access to the work-rubbing surface thereof.

The described' construction will be seen to provide a finishing machine in which the burnishing tool may be electrically heated with relatively high eiiiciency by reason of the direct conductive metallic path provided for the transfer of heat from the electric cartridge unit to the work-rubbing sections of the burnishing tool. As. the work is applied to the work-rubbing surfaces 12, the individual sections of the tool will, although they are restricted as to inward and outward movement, have a tilting movement as the tions rests against a relatively soft metal cushion ring, the noise sometimes found in connection with such tools is practically eliminated. Y

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is: t

l. A finishing tool comprising a carrier member, sectional work-rubbing members resiliently attached to said carrier member at a point remote from the point of appl1` cation of the work, and a cushion of relatively soft material interposed between thel resiliently supported work-rubbing members and the carrier member'kbeneath the point of application of the work.

2. A finishing tool comprising a carrier member, sectional work-rubbing members, fiat springs attached to said carrier member at one end and supporting the sectional members at their other ends, and a. cushion of relatively soft material'interposed between the free ends of the springs and the carrier member.

3. A finishing tool comprising a carrier member, sectional work-,rubbing members resiliently attached to said carrier member, and means for substantially eliminating inand-out movement of said members constructed and arranged to permit twisting movement thereof thereby allowing the iron to conform to the work.

4. A finishing tool comprising a carrier member, sectional work-rubbing members, flat springs connected to said carrier member at one end and rigidly attached to and supporting said work-rubbing members at their other ends, and means for limiting the in-and-out movement of the work-rubbing members constructed and arranged to allow tilting of said work-rubbing members with a consequent twist-ing of said springs.

5. A finishing toolcomprising a carrier member, resilient supports attached to said member, sectional work-rubbing members carried on said resilient supports at a point remote from their point of attachment, and a fluted ring interposed between said carrier sleeve and said resilient supports at the free ends of the resilient supports constructed and arranged with a iiute in a predetermined relation to each section of the work-rubbing member so that said sections may tilt to conform the iron to the work without allowing inward movement of the sectional members.

6. A finishing tool comprising a carrier To improve this action,

member provided with a longitudinally vtinted ring at one end thereof, and sectional work rubbing members mounted upon fiat springs fastened onsaid 'carrier Ymember .at a pointfremoved froml the fluted ring and arrangedin a predetermined relation to the liutes thereof, said work-rubbing members being. provided with a-rounded surface-cooperating with said fiuted ring to allow tilting ofthe sections of the iron while` restricting ther inward'V movement thereof.

7 ,.A finishing tool comprising a carrier Y member, avlongitudinally tinted ring adjacent to one end ofvsaid carrier member, flat supporting springs secured to said carrier member adjacent to its other end, and sectional work-rubbing members having base portions secured to the free ends ofr said springs, said base portions being provided with rounded surfaces co-operating with the fluted ring to allow tilting movement `of the sections of the iron and arranged in predetermined position with respect to said flutes thereby to limit the nward movement of the work-rubbing memers.

8. A finishing tool comprising acarrier member, a longitudinally luted ring adjacent to one end of said carrier member, fiat supporting springs secured to said carrier member adjacent to its other end', sectional work-rubbing members having base portions secured to the free ends of said springs, said base portions being provided with rounded` upper and under surfaces, said un, der surfaces co-operating with the fiuted ring to allow tilting movement of the sections of the iron and arranged in predetermined position with respect to said iutes thereby to limit the inward movement of the work-rubbing members, and any over-` hanging retaining ring 'co-operating with the rounded upper surfaces on the bases of said sectional members tolimit the outward movement thereof while not restricting thetilting movementv of the sections.

9. In a machinev of the character described, a hollow tool-carrying shaft, a heating unit disposed in the hollow of said shaft, a finishing 4tool provided with a carrier sleeve disposed on said shaft adjacent to said heating unit, sectional work-rubbing members resiliently supported on 'said sleeve, and a metallic ring of high Lheat conductivity disposed between said sectional workrubbing members and the carrier sleeve at a. pointiadjacent to the position of the heating unit to form a conductive path of low resistance directly from the heating unit to the work-rubbing members. l

l0. A finishing tool comprising a carrier member, sectional work-rubbing members, and means for supporting said work-rubbing members upon said carrier member constructed and arranged to allow limited movement Aof said Work-rubbing members circumferentially While substantially eliminating radial movement'l thereof.

111. A finishing toolfoomprsing a carrier member, and sectional Work-rubbing members h flexibly 'supported on `said carrier Amember and normally held lagainst radial Vmovement mwardly under pressure of the work.

12. A finishing tool comprising `a .Carrier member, and sectional Work-rubbingrmembers flexibly supported on said carrier member and normally held against radial move 'ment inwardly under pressure of the Work and also held against outward radial movement under the action of centrifugal force.

` 13. A finishing tool comprising la Carrier member, sectional ciroumferentially leXtend- A allov7 the Shanks toftwist in `a circumferential direction While substantially preventing radial movement thereof.

In testimony whereof I have `signed my named to this'speoiioation.

FRANK A. E. MARSH. 

